Answer:
plane
point
line
Explanation:
Based on the options provided, the kinds of symmetry in a 2D number can be:
- Plane symmetry: This refers to a symmetry where a figure can be divided into two identical parts by a plane. This symmetry is also known as reflectional symmetry.
- Point symmetry: This refers to a symmetry where a figure can be rotated 180 degrees around a central point to produce the same figure. This symmetry is also known as rotational symmetry.
- Line symmetry: This refers to a symmetry where a figure can be divided into two identical parts by a straight line. This symmetry is also known as bilateral symmetry.
Therefore, the possible kinds of symmetry in a 2D number can be
plane symmetry,
point symmetry, or
line symmetry.